Allows standard in-ceiling and in-wall speakers to be adapted for use with 70-volt music and paging systems. 20Hz-20kHz ± 1dB frequency response. Primary taps: 20, 15, 10, 5W. Secondary impedance: 8, 4 ohms. Insertion Loss: 1dB. 6" leads Dimensions: 3½W x 2½H x 2"D. Includes self-adhesive mounting pad.